InChI=1S/C16H14O11S/c1-25-9-4-6(2-3-8(9)27-28(22,23)24)16-15(21)14(20)11-10(26-16)5-7(17)12(18)13(11)19/h2-5,15-19,21H,1H3,(H,22,23,24)